Fluid handling – Systems – Supply and exhaust
Patent
1983-02-15
1985-03-19
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
91457, 137871, F15B 1304
Patent
active
045052999
ABSTRACT:
A 3-port, 2-position, directional control valve has two cylindrical closure elements for the alternate connection of a control line to a return flow line and a high pressure line. The switching force exerted on a thrust member is transmitted via pressure pins, and a manifold member with a centrally-positioned axial bore connected to the control line is arranged between the closure elements. Sealing elements on the closure elements seal the exit openings of the bore in the manifold member alternately. One of the pressure pins extends through the manifold member eccentrically while extending parallel to the axial bore and is always under pressure, like the high-pressure-side closure element, so that the closure element on the low pressure side is always held open in the zero position of the valve while the closure element on the high pressure side is acted on by the pressure medium in the direction of closure. The switching force required to open the valve is small because the pressurized cross-sections of the axial bore and the pressure pin are constructed to be small.
REFERENCES:
patent: 2200830 (1940-05-01), Beharrell et al.
patent: 2535785 (1950-12-01), Couri
patent: 3081793 (1963-03-01), Flatt et al.
patent: 3814133 (1974-06-01), Veh
patent: 3815633 (1974-06-01), Greenwood et al.
patent: 3821880 (1974-07-01), Weirich et al.
patent: 4327628 (1982-05-01), Weirich et al.
Krieger Karl
Welzel Josef
Hermann Hemscheidt Maschinenfabrik GmbH & Co.
Michalsky Gerald A.
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